node.js - Pass function to next function, fire depending on condition. nodejs -

im using express.js create node.js rest server, part o creating simple session system. have 3 modules:

• app.js
• highscoreman.js
• usersession.js

the app.js url http://localhost/api/highscores calls usersession given parameters:

//get highscores app.get('/api/highscores', function (req, res) {   usersession.checkvalidity(req.query['username'], req.query['sessionid'], highscoreman.getall(req, res)); }); 

however, in checkvalidity function pass automatically called:

function checkvalidity(username, sessionid, callback) {   usersession.findone({ userid: username, sessionid: sessionid }, function (err, result) {         if (err) {           console.log(err);         }         if(result) {           callback;         }   }); } 

i want run function being passed given proper results database(other checks added later session dates etc.). how this?

to delay calling highscoreman.getall(), you'll need make statement of function can called later:

app.get('/api/highscores', function (req, res) {   usersession.checkvalidity(req.query['username'], req.query['sessionid'], function () {     highscoreman.getall(req, res);   }); }); 

otherwise, it's being called , return value instead being passed usersession.checkvalidity().

note you'll need adjust checkvalidity call passed callback:

// ... if(result) {   callback(); } // ...